update some usage of println! to dbg!

Author: mikemorris

listings/ch08-common-collections/listing-08-24/src/main.rs

@@ -7,6 +7,6 @@ fn main() {
     scores.insert(String::from("Blue"), 10);
     scores.insert(String::from("Blue"), 25);
 
-    println!("{:?}", scores);
+    dbg!(scores);
     // ANCHOR_END: here
 }

listings/ch08-common-collections/listing-08-25/src/main.rs

@@ -8,6 +8,6 @@ fn main() {
     scores.entry(String::from("Yellow")).or_insert(50);
     scores.entry(String::from("Blue")).or_insert(50);
 
-    println!("{:?}", scores);
+    dbg!(scores);
     // ANCHOR_END: here
 }

listings/ch08-common-collections/listing-08-26/src/main.rs

@@ -11,6 +11,6 @@ fn main() {
         *count += 1;
     }
 
-    println!("{:?}", map);
+    dbg!(map);
     // ANCHOR_END: here
 }

listings/ch12-an-io-project/listing-12-01/src/main.rs

@@ -2,5 +2,5 @@ use std::env;
 
 fn main() {
     let args: Vec<String> = env::args().collect();
-    println!("{:?}", args);
+    dbg!(args);
 }

listings/ch16-fearless-concurrency/listing-16-12/src/main.rs

@@ -8,5 +8,5 @@ fn main() {
         *num = 6;
     }
 
-    println!("m = {:?}", m);
+    dbg!(m);
 }

listings/ch18-patterns-and-matching/listing-18-18/src/main.rs

@@ -12,6 +12,6 @@ fn main() {
         }
     }
 
-    println!("setting is {:?}", setting_value);
+    dbg!(setting_value);
     // ANCHOR_END: here
 }

listings/ch18-patterns-and-matching/listing-18-21/src/main.rs

@@ -6,6 +6,6 @@ fn main() {
         println!("found a string");
     }
 
-    println!("{:?}", s);
+    dbg!(s);
     // ANCHOR_END: here
 }

listings/ch18-patterns-and-matching/listing-18-22/src/main.rs

@@ -6,6 +6,6 @@ fn main() {
         println!("found a string");
     }
 
-    println!("{:?}", s);
+    dbg!(s);
     // ANCHOR_END: here
 }